\documentclass{article}
\usepackage{tabularray}

\begin{document}
\begin{tblr}{
	hlines = {white},
	vlines = {white},
	cell{1,6}{odd} = {teal7},
	cell{1,6}{even} = {green7},
	cell{2,4}{1,4} = {red7},
	cell{3,5}{1,4} = {purple7},
	cell{2}{2} = {r=4,c=2}{c,azure7},
	}
	Alpha   & Beta  & Gamma   & Delta   \\
	Epsilon & Zeta  & Eta     & Theta   \\
	Iota    & Kappa & Lambda  & Mu      \\
	Nu      & Xi    & Omicron & Pi      \\
	Rho     & Sigma & Tau     & Upsilon \\
	Phi     & Chi   & Psi     & Omega   \\
\end{tblr}
\end{document}
